1t2n

Structure of a thermostable triple mutant of Bacillus subtilis lipase obtained through directed evolution

spinqualitylabelsall models 1t2n, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1t2n is a 1 chain structure with sequence from "bacillus_globigii"_migula_1900 "bacillus globigii" migula 1900. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: K Related: 1t4m Gene: LIPA, LIP, BSU02700 ("Bacillus globigii" Migula 1900) Activity: Triacylglycerol lipase, with EC number 3.1.1.3 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [ESTA_BACSU] Active toward p-nitrophenyl esters and triacylglycerides with a marked preference for esters with C8 acyl groups. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Variation in gene sequences generated by directed evolution approaches often does not assure a minimalist design for obtaining a desired property in proteins. While screening for enhanced thermostability, structural information was utilized in selecting mutations that are generated by error-prone PCR. By this approach we have increased the half-life of denaturation by 300-fold compared to the wild-type Bacillus subtilis lipase through three point mutations generated by only two cycles of error-prone PCR. At lower temperatures the activity parameters of the thermostable mutants are unaltered. High-resolution crystal structures of the mutants show subtle changes, which include stacking of tyrosine residues, peptide plane flipping and a better anchoring of the terminus, that challenge rational design and explain the structural basis for enhanced thermostability. The approach may offer an efficient and minimalist solution for the enhancement of a desired property of a protein. Structural basis of selection and thermostability of laboratory evolved Bacillus subtilis lipase.,Acharya P, Rajakumara E, Sankaranarayanan R, Rao NM J Mol Biol. 2004 Aug 27;341(5):1271-81. PMID:15321721 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Lipase

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